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Proceedings Paper

Photon-sparse microscopy: Trans-wavelength ghost imaging
Author(s): Reuben S. Aspden; Nathan R. Gemmell; Peter A. Morris; Daniel S. Tasca; Lena Mertens; Michael G. Tanner; Robert A. Kirkwood; Alessandro Ruggeri; Alberto Tosi; Robert W. Boyd; Gerald S. Buller; Robert H. Hadfield; Miles J. Padgett
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Paper Abstract

Ghost imaging systems use down-conversion sources that produce twin output beams of position-correlated photons to produce an image of an object using photons that did not interact with the object. One of these beams illuminates the object and is detected by a single pixel detector while the image information is recovered from the second, spatially correlated, beam. We utilize this technique to obtain images of objects probed with 1.5μm photons whilst developing the image using a highly efficient, low-noise, photon-counting camera detecting the correlated photons at 460nm. The efficient transfer of the image information from infrared illumination to visible detection wavelengths and the ability to count single-photons allows the acquisition of an image while illuminating the object with an optical power density of only 100 pJ cm-2 s-1. We apply image reconstruction techniques based on compressive sensing to reconstruct our images from data sets containing far fewer photons than conventionally required. This wavelength-transforming ghost imaging technique has potential for the imaging of light-sensitive specimens or where covert operation is desired.

Paper Details

Date Published: 12 May 2016
PDF: 9 pages
Proc. SPIE 9824, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII, 982407 (12 May 2016); doi: 10.1117/12.2223378
Show Author Affiliations
Reuben S. Aspden, Univ. of Glasgow (United Kingdom)
Nathan R. Gemmell, Heriot-Watt Univ. (United Kingdom)
Peter A. Morris, Univ. of Glasgow (United Kingdom)
Daniel S. Tasca, Univ. of Glasgow (United Kingdom)
Lena Mertens, Univ. of Glasgow (United Kingdom)
Michael G. Tanner, Univ. of Glasgow (United Kingdom)
Robert A. Kirkwood, Univ. of Glasgow (United Kingdom)
Alessandro Ruggeri, Politecnico di Milano (Italy)
Alberto Tosi, Politecnico di Milano (Italy)
Robert W. Boyd, Univ. of Ottawa (Canada)
Univ. of Rochester (United States)
Gerald S. Buller, Heriot-Watt Univ. (United Kingdom)
Robert H. Hadfield, Univ. of Glasgow (United Kingdom)
Miles J. Padgett, Univ. of Glasgow (United Kingdom)

Published in SPIE Proceedings Vol. 9824:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XVII
Augustus Way Fountain, Editor(s)

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